(57) Anti-spin device for a gyrating rock crusher including a stationary spindle (62)
and a crusher head (36) driven by an eccentric (20) and running in a stationary crusher
bowl (48). A clutch member (70) having a square cross-section fastened to the top
of the spindle (62), and a polyurethane body (80) is fastened to the crusher head
(36) and having a square opening (81) receiving the clutch member (70). The clutch
exerts sufficient resistive torque on the crusher head (36) to prevent it from spinning
with the eccentric (20) in the unloaded condition, but allows the head to counter-rotate
slowly during crushing operations.
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